Patent GB-1213679-A (GB)
Title: Post cure tire inflators
IPC: B29D30/06
Filed: 1968-06-04
Abstract: 1,213,679. Moulding tyres. NRM CORP 4 June, 1968 [12 June, 1967], No. 25557/68. Heading B5A. A post-cure tyre inflator comprises two chucks for releasably holding two tyres respectively for movement between a loading station and a cooling station, a chuck support and means for rotating the support about a horizontal axis, the chucks being on opposite sides of said axis and means for rotating the support to index first one and then the other chuck from the cooling station, where the axes of the chucks are horizontal to maintain the tyres held thereby in a vertical plane, to the loading station, which is circumferentially displaced from the cooling station, to allow the removal and replacement of the tyre from the appropriate chuck and the return of the chuck to the cooling station. The apparatus of Fig. 2, simultaneously receives two tyres from a dual cavity press via a downwardly inclined roller conveyer, and includes four pairs of tyre rim assemblies 58-98, 59-99, 60-100, and 61-101 arranged so that two pairs of assemblies with tyres mounted between each pair are located at a cooling station whilst two fresh tyres are being received by the other pairs. The assemblies are mounted on a frame 32 pivotally supported by pins 41, 42 on a framework 14-17; a reversible drive motor 47 rotates the frame to transfer the assemblies from loading to cooling solutions and vice versa. Each tyre to be cooled is received by a roller conveyer, Fig. 3, located within the framework 14-17, and each conveyer is composed of two sections, each section comprising rolls 130-132 mounted on plates 134, 135 and forming a central opening 133 for the passage of a tyre inflating rim assembly carried at the outer end of a yoke 33 or 34. The plates 134, 135 have flanged wheels enabling the sections to be adjusted towards and away from each other. Associated with the sections is a tyre stop 127 which is adjustable and retractable, and adjustable side guide rollers 125, 126 at the ends of pivoted arms 175, 176. The latter form part of a linkage mechanism 158-164, 171, 172 connected to a housing 152 slidable on guides 150, 151 and operated manually by a crank handle 146. Each pair of rim assemblies includes an assembly, such as 101, mounted in a bearing at the end of a yoke 33 or 34 movable towards and away from a co-operating rotatably driven assembly such as 61, keyed to one end of an axle 56, Fig. 6, carried in a hub 54 secured to a support plate 52 attached to the pivoted frame 32. A similar assembly is keyed to the other end of the axle and both are slidably mounted thereon. Both axles of the assemblies are driven by a motor 75 and belts 79, 80. Each yoke forms part of a frame, Fig. 4, which includes sleeves 91, 92 slidable on guide pins 68, 69 carried by the frame 32, and the yokes are moved by a piston and cylinder 96 located between them and arranged so that when the uppermost pair of assemblies 58-98, 60-100 are locked together the lower assemblies can be moved downwardly and guided on further pins 116, 117 upstanding from the main framework. When a pair of assemblies, such as 61, 101 are brought together by the raising of the assembly 101 from a position below a pair of conveyer sections, the tyre is raised thereby and its bead rims clamped between members 203, 184, Fig. 6. A hollow part 180 of the assembly 101 is supplied with inflation air via a pintle 181 and the associated assembly 61 is fed with pressure air from a passage 240 in the axle to force the assembly downwardly on its axle; a further air supply is fed via a passage 237 and a line 235 to the upper end of a piston 216 to force it downwardly against a spring 223 and to the position shown in Fig. 6. In the latter position a number of balls 213 are held within the periphery of a cylindrical part 206, but when the assemblies are brought together a switch 73 is operated and the pressure air above the piston 216 is vented enabling the spring 223 to force the piston upwardly causing the balls to engage grooves 217 and forcing them radially outwardly. A limit switch is then operated by a rod 227 and the tyre inflated via the pintle 181; such pressure forces the assembly 61 upwardly until the balls engage the underside 190 of a ridge to prevent further separation. A further switch 262 is operated and the tyres shifted to their cooling stations. (For Figures see next page.)